> ## Documentation Index
> Fetch the complete documentation index at: https://novita.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Kling V2.1 Master Image to Video

Kling 2.1 Master: The premium endpoint for Kling 2.1, designed for top-tier image-to-video generation with unparalleled motion fluidity, cinematic visuals, exceptional prompt precision, and 1080p video quality.

<Tip>
  This is an **asynchronous** API; only the **task\_id** will be returned. You should use the **task\_id** to request the [**Task Result API**](/api-reference/model-apis-task-result) to retrieve the video generation results.
</Tip>

## Request Headers

<ParamField header="Content-Type" type="string" required={true}>
  Supports: `application/json`
</ParamField>

<ParamField header="Authorization" type="string" required={true}>
  Bearer authentication format, for example: Bearer \{\{API Key}}.
</ParamField>

## Request Body

<ParamField body="image" type="string" required={true}>
  First frame of the video; Supported image formats include `.jpg`, `.jpeg`, `.png`; The image file size cannot exceed 10MB, and the image resolution should not be less than 300\*300px.
</ParamField>

<ParamField body="prompt" type="string" required={true}>
  Text prompt for generation; Positive text prompt; Cannot exceed 2500 characters.
</ParamField>

<ParamField body="duration" type="string" default="5">
  The duration of the generated media in seconds.

  Available options: `5`, `10`
</ParamField>

<ParamField body="guidance_scale" type="number" default={0.5}>
  The guidance scale to use for the generation.

  Range: 0 to 1
  Step: 0.01
</ParamField>

<ParamField body="negative_prompt" type="string">
  Negative text prompt; Cannot exceed 2500 characters.
</ParamField>

## Response

<ResponseField name="task_id" type="string" required={true}>
  Use the task\_id to request the [Task Result API](/api-reference/model-apis-task-result) to retrieve the generated outputs.
</ResponseField>